What he wants is a shooting cross-bow or some sort of funky-new-contraption to use so you take it, shoots some sort of projectile with a string attached to it, he then when it hits something the rope stops coming out and is at that only. I say he wants it to be climbable, so lets say you got a spitfire coming, got hidden with this "Thing" shoot it at the plane, hits it and your hanging about 16 studs from the plane, he notices you and tries to swing you off. You interfere with the terrain, and you can even climb up and take the plane down, hoping you can use a weapon with this, right click and you get off the rope.